Hoisting mechanism



Jan. 13, 1931.

Filed March 25, 1929 4 Sheets-,Sheet l Jan. 13, 1931. T. zE-rTERLUNDHOISTING MECHANISM Filed March 25. 1929 4 Sheets-Sheet 2 Jan. 13, 1931.l T. zET'rERLUND HOISTI-NG MECHANISM 4 Sheets-Sheet 4 Filed March 25,1929 driven. from either one or the otherof two j 'Patented"Jan. 13,1931 ArrroMATro Hoisr coMPaNY,

or MILWAUkan,y Wisconsin HoIs'TiNG ME'onANIsM Application ined March a5,

This invention relates to ahoistingA mech-` anism, f l

IA(Objects of this invention are to provide a 'novel form of hoistingmechanism in which a hoisting drinn sheave or member is carried by ahoisting drinn shaft andis reversely rotating.members, either of `which`maybev operatively connected in driving reiation to thefhpisting drum,and to provide 'brake mechanism' positively, .operatively connectedto:thezhoistingidrum vand applied Whenever the driving men'ibers areboth operr-tively disconnected Afrom` theV hoistingV possible chance ofdrum :so that there is no the slipping of the load.-

Further objects are toprovide a 'hoisting ineehanismin Which twopositiveclntohes are .employed and associated with -elontrol mechanismin such a. manner-that only one clutch. maybe closed ata.time,the`control mechanism being. so related-to 'the brake mechanism`as to release the' brake Whenever either clutchis closed. V

control mechanism Which hasa'fquiok inotion for closing either clutch,soithat there VisvnoA grinding ofthe clutch vjavv's but in VWhiohthelclutching .is positively and quickly Whenever the mechanism isopeffected;

erated in a-predetermined manners l Further ob] ectszare to `provide aconstruc-v tion in which there are independent rock shafts for'controlling the `clutches f andV in which a balancing-mechanism is`employed and connected with the brake, application of the brake alwaysoccurs `When the vtwo clutchesfare; out, .and so that the brakel isalwaysreleased when either clutch is operated.` 1

f vFurther objects are to provide a compact, serviceable and novel-typeof hoisting meelanisni in which the entire apparatus is portable andself-contai`ned, and inwhich the consti-notion 1s simple, ruggedand-snbstantially fool-proof. Y

ratns with parts sectionedofi'.

- the hoistingishaft l.

Anembodiinent ofthe invention is shown Y 1929. fseriai No. .349356.

- -UNITED STAT .YP-Aralar Tampon .zETTEnLUNn' or 'MILWAUKEE Figure 2isla plan View of the mechanism `With the upper1 part oftheycontrolineohanism audits associated casingremovedQand with parts in 4section. Y Y

Fignrel 3 `is *av sectionalL view; on .jaA line 3,-3 offFigure l.

control shaft land 1 associated mechanism. 1

Figure 5 isa-detail .ofa springy construe#` portion oft-he tripV orrelease mechanism.v

Figure r(is a'sectional detail showing gthe F 'gnregfi is. alfseotionalf` view through Ythe Gef cintchrock shaft. andassocijatedpartsj Y Referring to the: drawings:particularly Figure, it will be seenthat a hoisting shaft l is suitablycarried byfbea'rings formed Y Thishoisting shaft rigidly car` ries a hoisting. sheave 3 and. a'hoistingdrum Obviously, either one 'or the otherof thezdrums maybeomitted5 asdesired, or both. may bensd- Without departv from thespirit of thisfinventiong v y. aThe hoisting shaft is driven frorna jacli .Furtherobjects are .to .provide clutch acasing 2.

4 at opposite ends.l

the jack shaft and meshingivitha relatively. large gen1; rigidly'Carried. by

therefore permanently5 'operatively coupled bythe gearing. t ..7-1

-Ai pair of .bevel loosely mounted' upon the jacke shaft .5f and PlnlOnS.OrifgearS i 8 .are

. These tvvoj shafts are 'i are rotated in topposite-` directionsbymeans Y 0f. a' bevel ably mounted in rollerbearings Vcarried doy pinionlorfgeary 9,. rigidly carried by `the drive shaftl 10Q'V TheA shaftsare. suit so that the.

astationary portionof the casing; and also f the bevel f gears y8V are.carried .by roller bearingsvand supported from ajstationary .ponV Ytion -lof the Figure. v3. f

9. par of sudati@ clutcamembeifs 117,1whigh areoperated bymeans of'forked'. levers 12;

rigidly carried yby the `rock s haftsl forthe clutches. v` v These rook`shafts#fprojeotV -"ont-- vvardly vbeyond Vthicasing:as shoyvn inyFig-1.nje s ,.2v and 7,l and are provlded W-i 'clutches at their squaredportions, as` indicated in Figure 2.' l

The jack shaft 5 is provided with a rigidly attached brake drum 16 l(see, Figurel 3) which cooperates with a brake band 17.

This brake band is` prevented fromturning by means of the U-shapedmember "18 "(see Figure 1). The' U-shaped member loosely and slidablyvitsOne of aplurality ofjsupporting jpins 19 Yprojectingoutwardly from Llthe casing of tliema'chine, asshownfin 'Fig- 15 its contacting withtherotating brake drum ures 1 and 3, and carrying at their-outer ends ashielding ring 20, as shown' inFigure 3. In order to preventtlre;bra keband from excessive wear at any one portion due to when thebrake isopen, a limit screw 21 is provided"andcarried by a bracket andlcontrolsthe rearward or outward motion ofthe U-shap`ed member, 18, thus causingthe brake band to be entirely free fronr contact with the rotating brakedriunlat'thetime when the brake band is untensioinedj` The brake Y bandmay be tightenedv by means' of 'any suitable mechanism, for instance, aro,d 22

l (seeFigure 1) may extend 'through *a-Kpivotedv bloclrcarried by'alev'er23, one/end ol' such lever being pivoted to the opposite end ofthe brake band fromfthat carrying the portion ofithe machine.

rod 22. The rod maybe threaded and vmay desired. c f' c Y The leverv23"(far1ies at its outer orffree end-a rod'or link f24,asv showninfFigures '1' and -2Q l This link2tr extends to the free end of' alever 25, 'the oth'er end'y of the lever25 being pivotfally mounteduponfa stationary carry adjusting nuts to take up forwv'ear, las

Y ofthe rock-shafts 113 -f-fo'rthe clutches.,V

From the description'thus far given, it. is apparent thatlwhenvtheilevers 15,` are 'in their clutch openlpositionsgasfshown in'Figure 2, that the centraljpivot 29f0r`the'lever 2G will bev in f itsoutermost positionandconsequently, the brake will `be applied. If,however, either-lever lr'ocks into clutchclosing' position, theextension 28 thereof 'will releas'e-itspres's'ureupon the ro'd orlink27, and will l correspondingly allow theV lever 26 to-fro'ck inwardlyatcone` end. This'accord-v ingly 'moves the lever25 andthus releasesthefbrake. As-soonas the clutch isopemthe brake `isi-againapplied,-las"described above, for then bot'hclutches 'willbe' intheiropen positions; v p Y y* v No spring? mechanism has been:shown'r-'as associated with the'brake band and the re itselfand thusaid in the motion of the related parts.v This latter is the form shownin the drawings. .i v Y Each ofthe clutchjroclrshafts 18,'as'shown in"Figure 7 is spring urged 'towards clutch closing position by means ofthe spring BO. This spring may'have one end secured to a rigid .portionof the machine and may loosely surround the rock shaft 13, its other endbeing` hooked Lin a slot 31, A(see Figure 5) formed inanadjustablesleeve or shield 36. This shield 36, as shown .in Figure 7, ispreferably .provided with a socket 37 adapted to 'receive a suitabletool for rotatingthe shield After the required tension hasb'eenobtained, al set screw 38 is tightened `andthus locksthe sleeve 36 totheroclr shaft.

The clutch. operating leversfl are spaced apart slightly, andl carryat,their free ends rollersf 39, y as shown V1n Figure. 2,` which cooperate.withV camsftO, the/cams being' vpreferably placed one behind the otherand,

of course, in line with the cam follower rollers 39. The shape/offeneofthe cams is shown in 4full lines and theother "cam in dotted'lines inFigure 2; The shape ofthe two 'cams is identically the 'same except thatthey areA reversed Although two cam plates are shown, it is to bedistinctly understood: that they are'rigidly connected with each otherandimay, if desired, Ybe integral, as indicated in Figurevllf Thus,after the cams arerotated, the cut-outi-portion of one or the otherl c'am'is presentedV to the appro'- priate roller. 39. Thecorrespondingflever' `15, however, is preventedV from moving iny wardlyby' means of |`a hardened bearing plate' filyc'arriefd .by the leverwhich contacts witlr a l l plate42,KVV carriedr by onel arm 4:3` of abellcrank Ylever,=see vFigure 2.' i

The other Varm, 44 offsuch lever, projects inwardlyl between-the ,twolportions of the cam. Y lt is adapted `to be struck by a trip pin45carriedbyfthe cam. :The construction of the quick motion mechanism isof course duplicated on the opposite sideofthe control cannas shown inFigure 2. y

In operation, it is clearthat Yafterthe cam is 'rotated in onedirection, one ofthe `cutouts is presented.Y to the corresponding roller89., The roller, however, is prevented'from.

moving inwardly until'the pin 45 hits the '=c'orre'sponding hardenedVbearing corresponding lever 44: vand thus'trips the catchwhichrestrain's the rocking motion of the lever 15.k Thus, when 'the'pinV hits the catch of the trip mechanism, the llever -1'5 `movesinwardly very quickly under the infininter-locking teeth being providedon the rotatingpinions and clutch members as shownin Figure 3. Thisquick inotion'mechanism is provided for yclosing one or the'` other oftheclutches. yThrough the. link mechaioA nisin Apreviously described, itis apparent that thebrake is released Whenever a clutch is closed. Y v

' Then the clutch is again opened the latching mechanism is re-set bymeans of a spring. The spring for one of the latching devices isindicated by the reference character 46 in Figure 6, and it will be seenthat it is loosely coiled about the pivot pin 47, for the latchingmechanism, and has one end secured to such pin and the other endcsecuredto the tripleverlt.

The pin 47 may be carried within a socket formed in a portion of thecasing and re- Y, tained in Vplace by means of-'a set screw 48,

" as shown in Figure 6.-

g carried by an upwardly extending' auxiliary casing 50, bolted to themain portion ofthe c machine by means of the bolts 5l. A".lhis 3 0`controller shaft an'dgauxiliary casing are sectioned olf in Figure 2,but are shown in detail in Figure 4.A lThecontroller shaft is providedat'itslower end with a disc 52,

equipped withV a pair of downwardly extendjing' lugs 53 whichfit ,intoopenings in the cani/10,'as shown in Figures 2 and ,4. The

i 'upper end of the controller shaft 49 carries i elevator constructionsuch as employed dur-l any suitable control mechanism, for instance, apulley 54' to Y `which contrjol cables not e control- The "device isadapted for a temporary ing the erection of a building.` If a two-carelevator s Y'stem is employed, then the main cable is wrapped around thesheave 3. K- If, however, a single cary elevator system is eni- In orderto avoid needless repetition of terms, the expression drum will be usedin the claims as indicating either the sheave or the drum.

cam in' neutral position when the hoist is not in oper-ation, aspring-pressed lever 55 is providedwith rollers 567which vlit into'corresponding notches 57Y (see Figure l) formed in the Ytwo .portions 0fthe cam. Thus, these spring-pressed rollers tend tok maintain the camin' neutralposition against accidentalfshifting. Y d Y A Y.

It will be seen that a novel Iform of hoisting mechanismhas'been-provided by this.,A

The means for operatinefthe'control cam consists of a controller shaft.49, which is ployed, the cable is wound around the drum-l V50V 4.

invention, whichis of 'relativelyrsimple construction, Vwhich is freefrom delicate and easily .broken parts, and which is easyto operate. v YY f lt will be seen substantially fool-proof; the brakeis always setwhen both clutches are open and yis always released ywhen either clutch;is closed.

further,` that the device vis- Although the invention has beendescribedin considerable detail, such description is intended as illustrativerather than limiting, as the invention may be variously embodied and`asthe scope ofy such invention is tobe determined.asclaimedf l 7 l lclaim: i V

l. A hoisting mechanism comprisingk a hoisting shaft, a ,drumY carriedby said `hoisting shaft, a jaclr vsli-aft geared to said hoist-v ingshaft, ay pair of revoluble members, means for rotating saidfmeinbers inoppositek directions,y clutchesV 'for selectively connecting .saidmembers. tosaid jackshaft, a

brake drum carried by` said jack; shaft, a

- brake lfor said drum, and mechanism.opera-Y tively connecting saidbrake andclutchesfor.

releasing saidbrale `when. eithen clutch ris closed and-forV applyingsaidibr-ake :when V both clutches e selectively operating saidclutches..

2. A. hoisting mechanism comprising a hoistingk shaft, a drum 'carriedby said'hoisting shaft, Jackl sli-aft, a `pinion rigidly carried by saidfjaclc-fsliafhfa gear rigidly carriedby saidhoisting shaft and meshingwith said pinion, a pair o'f'revolubleemembers, means for rotatingy saidmembers in opposite; directions, clutches for. selectively are open, andcani means for connectingsaid members to said jackgshaft,

a brake :drunicarried byl said. jack shaft, :a brake forsaid drum, andmechanismqoperatively connecting said brakeand clutches forreleasingsaid brake when either clutch is closed and for-. -applyingsaidbrake when both :clutches are `open,` and quick. motion,

cam controlled f means for operatingfsaid clutches'.

3. A hoistingv mechanism comprising; a` hoisting -shaft,*a. drumcarriedV by said hoist-v ing shaft, a jack shaft geared to said hoistingshaft, brake` vfor 'saidjacl shaft,"a

Vmovable /inember for-'controlling said brake,

anequalizing lever pivoted intermediate its endsto said movable member,apair of `re- YYversely rotating members,clutches-for selec- In order toinsure thev maintenance ofthe said equalizing lever.vv .c

. 1l. A jhoisting @mechanism .comprising a1 hoistingshaft, a. 'drumcarriedby saiclrhoist-l ing shaft, a 'Jack shaft geared to said Lhoist-ving shaft,a Y brake;V for saidVV jaclrshaft, a movable' member for icontrollingsaid brake,-

an equaliaiiig lever pivoted'::intermejdiatefits ends tor vsaid movablemember, "a 1 pair ofA -re versely rotating members, clutches forselectively coupling one or the other of said reversely rotating membersto said jack shaft, levers for y operating said clutches, means;connecting' said levers to opposite ends of said equalizing lever, andquick motion mechanism for controlling said clutches. 5. Ar hoistingmechanism comprising a hoistinglshaft, a hoisting drum carried by saidshafta jaclr shaft geared to said hoist,- ing shaft, a brake drumcarried by said jack shaft, aV brake band surrounding saiddrum, a brakeoperating rodcontrolling said brake band, a pair of'reversely rotatingmembers, clutches for connecting either of said ieversely rotatingmembers to said ack shaft, a, pair of leversfor operating said clutches,a brake lever connected toty said brake rod, and an equalizing leverpivoted intermediate its ends to said brake leveigfthe ends of saidequalizing lever being connected tothe levers for. operating theclutches.

1G. A hoistingnmechanism, comprising a hoisting shaft, a. hoistingdrinnA carried by saidsha'ft, a jack shaft geared to .said hoistingshaft,V a .brake drum carried by said jack shaft, a bralze bandsurrounding said drum, a

` brake operating rod controlling said. brake drum, a pair ofreverselyrotating members, clutches for connecting either of said reverselyrotatingy members to saidI jack shaft, a'v

pairof levers for operating said clutches, a brake lever connected tosaid brake rod, and an equalizing lever pivoted intermediateits endstofsaid brake lever, the ends of said equalizing lever being connectedto the levers foreoperating the clutches byfmeans of rods, said lastmentioned rods and said brake rod being. adjustable. 1 i

2" ,Al hoisting device comprising a hoisting shaft provided with a drum,power means, a pair of revoluble, membersdriven in reverse directions yb-y saidpowermeans, clutches for. selectively, operatively coupling saidrevoluble Vmembers Vto said hoisting shaft, a pair of levers forcontrolling the operation of said clutches, springs urging said'leverstowards clutch-closing position, a

pair of spaced cam discs controllingthe movement of theI freeA ends ofthe clutch control- Y ling-:levers and each vhaving a cut-out toperinitrtheinward motion of the respectiveY lever-when the cam discs arerotated to Vprey determined positions, a pair of springs pressed triplevers projecting into the space between the cam discs, a pin carried bysaid cam discs for `striking one or the other of said trip levers, saidtrip levers normally restraining the inward motion ofthe clutchcontrolling levers. K Y i V8. A hoisting levice comprising a hoistingsha-ftl provided with a drum, power means, a pair of revolublemembersdriven in reverse/directions bysaid power means,l

l messes;

clutchesforselectively, operatively coupling said revoluble membe 's4 tosaid hoisting shaft, a pair of levers for controlling the operation ofsaid clutches, springs urging between thecaindiscs, a pincarried bysaidcam discs for striking one or the other of said trip levers, saidtrip levers normallyrestraining the inward motion of the clutchcontrolling levers, and a controller shaft removably attached to saidcam discs. 1n testimony that I claim the foregoing have hereunto set myhand at Milwaukee, in the county of Milwaukee vand State of Wisconsin,Vf

T HEODOR ZETTERLUND` iso

